☆ New: Tier List Maker & Community Tier List Contest!
★ Upcoming: Version 2.5, Zhao, & Ye Shunguang!
☆ 2.4 Agents: Dialyn, & Banyue
★ 2.3 Phase 2: Yidhari Release & Ju Fufu Rerun
☆ Tier Lists: Agents | W-Engines | Bangboos | Teams
★ Redeem Codes for free Polychromes!

An Outstanding Partner is the Bangboo Banner in Zenless Zone Zero (ZZZ). See all the current Bangboo drops and news on upcoming Bangboos in this guide!
List of Contents

Birkblick, the signature Bangboo of the Krampus Compliance Authority Faction, is now available to pull from the Outstanding Partner banner in the Version 2.4 update, which is slated to go live on November 26, 2025!

To unlock the Bangboo Banner, players must first unlock Hollow Zero. To do this, players must reach at least Level 20 in their Inter-Knot Level.

Afterwards, continue with the Story Quest to meet a person named Enzo, found very close to your home in Random Play. Talk to him, and this will unlock the Bangboo Banner!
| Tier 0 Bangboos (Best to Pick) | |||
|---|---|---|---|
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The S-Rank Bangboos above are currently the best Bangboos you can get in the Outstanding Partner banner due to their damage, utility, or synergy with the best team comps in the game.
The simulator randomizes an S-Rank Bangboo. But in-game, you can select which one to guarantee!
| Rarity | Pull Rate |
|---|---|
| S | Bangboo: 1% Guaranteed after 80 Signal Searches |
| A | Bangboo: 15% Guaranteed after 10 Signal Searches |
| B | W-Engine: 84% |
All Banners and Signal Search (Gacha) Guide

Whenever you get an S-rank drop, the Bangboo is guaranteed to be the one you picked out of the eight available in the selector. You can also switch your chosen S-rank as much as you like without resetting your pity counter!
Agent Gulliver
|
Amillion
|
Bangvolver
|
Belion
|
Birkblick
|
Butler
|
Mercury
|
Miss Esme
|
Officer Cui
|
Plugboo
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Red Moccus
|
Resonaboo
|
Robin
|
Rocketboo
|
Safety
|
Sharkboo
|
Snap
|
Avocaboo
|
Baddieboo
|
Bagboo
|
Boollseye
|
Cryboo
|
Devilboo
|
Electroboo
|
Exploreboo
|
Magnetiboo
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Paperboo
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Penguinboo
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Sumoboo
|
The Bangboo Banner does not have any S-rank or A-rank W-Engines. Higher ranking W-Engines are obtained from Character Banners or the W-Engine Banner, Dissonant Sonata, which is the only source of S-rank W-Engines.
There are no Characters available in An Outstanding Partner. Characters can only be obtained from Character Banners or the W-Engine Banner.

| Current Banners | |
|---|---|
Dialyn Debut Banner |
Dialyn W-Engine Banner |
Hugo Rerun Banner |
Hugo W-Engine Rerun Banner |
| Next Banners | |
|---|---|
Banyue Debut Banner |
Banyue W-Engine Banner |
Ellen Rerun Banner |
Ellen W-Engine Rerun Banner |
| All Gacha Guide Pages | |
|---|---|
| Best Banners to Pull On | Pity System Guide |
An Outstanding Partner Banner Guide



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